I've had a sourdough starter for years. A friend gave it to me in Alaska over 25 years ago, and at the time it was over 20 years old. After using it off and on over the years, and storing some of it dried just in case I had problems, I've recently started using it more--my sons discovered the joy of sourdough pancakes--but it had a vinegar-like odor for the first time. I appreciate the posts as this is the first time I've gone on line seeking out others who appreciate sourdough. Thanks for all your comments!